Pad and method for manufacturing a display device

Patent metadata

Field	Value
Publication number	US-12379745-B2
Application number	US-202017258813-A
Country	US
Kind code	B2
Filing date	Mar 20, 2020
Priority date	Mar 20, 2020
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

The present disclosure provides a pad for pressing a flexible display panel having at least one through hole to attach the flexible display panel to a cover glass. The pad includes a main body portion made of an elastic material. A surface of one side of the main body portion is a press surface for applying pressure to the flexible display panel. The main body portion is provided with at least one hollow structure, each hollow structure is provided with a first opening on the press surface, and each first opening corresponds to the at least one through hole of the flexible display panel. The embodiment of the present disclosure also provides a method for manufacturing a display device.

First claim

What is claimed is:

1. A pad for pressing a flexible display panel having at least one through hole to attach the flexible display panel to a cover glass, wherein the pad comprises a main body portion, which comprises a solid portion made of an elastic material, and at least one groove penetrating through a part of the solid portion in a thickness direction of the solid portion and opened from a surface of a side of the main body portion which is a press surface for applying pressure to the flexible display panel and each having a bottom within the elastic material; wherein
the press surface comprises a central region which is flat and at least one edge bending region which is connected to at least one edge of the central region and which has a rounded corner, on the press surface, and each of the at least one groove is provided with a first opening on the press surface in the central region, and the first opening is configured to directly face one corresponding through hole of the at least one through hole when the flexible display panel is intended to be attached to the cover glass by the pad.

2. The pad according to claim 1 , wherein
a bottom surface of the bottom of each of the at least one groove is larger than the first opening.

3. The pad according to claim 2 , wherein
a shape of the bottom surface of the groove is the same as that of the first opening, and
an orthographic projection of the first opening on the bottom surface of the groove is a first projection, a geometric center of the first projection is coincided with a geometric center of the bottom surface of the groove, all sides of the first projection and corresponding sides of the bottom surface of the groove are parallel to each other, respectively, and a distance between corresponding sides of the first projection and the bottom surface of the groove is between 0.2 mm and 2.5 mm.

4. The pad according to claim 1 , wherein each of the at least one groove comprises a first portion closer to the press surface and a second portion farther away from the press surface in a direction from the press surface to the bottom of the groove, and
an orthographic projection of the first portion on the bottom of the groove is within an orthographic projection of the second portion on the bottom of the groove.

5. The pad according to claim 4 , wherein the first portion has a first depth in the direction from the press surface to the bottom of the groove, and the second portion has a second depth in the direction from the press surface to the bottom of the groove; and
the first depth and the second depth each is in a range of 0.5 mm to 1 mm.

6. A method for manufacturing a display device, comprising:
providing a flexible display panel having at least one through hole between a cover glass and the press surface of the pad of claim 1 , such that the first opening directly faces the one corresponding through hole; and
approaching the pad to the cover glass, and pressing the flexible display panel to attach the flexible display panel to the cover glass.

7. The method of claim 6 , wherein
a shape of the first opening is the same as that of a second opening of the corresponding through hole, and a size of the first opening is larger than that of the second opening of the corresponding through hole; and
the flexible display panel is provided between the cover glass and the press surface of the pad, and a distance between a geometric center of the first opening and a geometric center of the flexible display panel is smaller than a distance between a geometric center of the second opening of the corresponding through hole and the geometric center of the flexible display panel.

8. The method of claim 7 , wherein
the geometric center of the first opening is located on a line connecting the geometric center of the second opening of the corresponding through hole and the geometric center of the flexible display panel, and a distance between the geometric center of the second opening and the geometric center of the first opening is between 0.5 mm and 1 mm.

9. The method according to claim 7 , wherein
a geometric center of the first opening is coincident with a geometric center of the second opening and all sides of the first opening and corresponding sides of the second opening are parallel to each other, respectively, and a distance between corresponding sides of the first opening and the second opening is between 0.5 mm and 1.2 mm.

10. The method of claim 6 , wherein before the step of providing the flexible display panel having the at least one through hole between the cover glass and the press surface of the pad, the method further comprises:
attaching the flexible display panel to a flexible carrier film to pre-deform the flexible carrier film and the flexible display panel on the flexible carrier film; and
the step of providing the flexible display panel having the at least one through hole between the cover glass and the press surface of the pad comprises:
providing the flexible display panel having the at least one through hole between the cover glass and the press surface of the pad in such a manner that the flexible carrier film is positioned on a side of the flexible display panel proximal to the pad.

11. The method according to claim 6 , wherein
the press surface comprises a central region and an edge bending region connected to at least one edge of the central region.

12. The method according to claim 11 , wherein
the first opening is provided in the central region, and
the central region comprises a convex arc surface with a curvature radius of 1000 mm to 1250 mm.

13. The method according to claim 6 , wherein
the first opening is bigger than or equal to a second opening of the corresponding through hole, which is an opening of the through hole on a surface of the flexible display panel close to the pad.

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Liu Shaokui
• Qing Wei
• Liu Xingguo

Classifications

• H05K5/0017

  with operator interface units · CPC title

• H05K5/03 Primary

  Covers · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• G06F1/1684

  Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 · CPC title